fix(scripting_workspace): HLSL export cleanup (#12512) 60b685278c

* fix(scripting_workspace): per-stage SPIR-V and rive SPIRV-Cross fork for HLSL

* fix(scripting_workspace): emit floatN(v,v,v,v) splats so FXC SM5 accepts baked HLSL

* style: clang-format

* chore(ore_gm_rstb): wrap kShaderOffsets in clang-format off

* fix(scripting_workspace): publishing build + PR review cleanups

* feat(scripting_workspace): emit HLSL struct-layout sidecar (target=17) for Unreal RHI

* style: clang-format

* feat(hlsl_struct_layout): ShaderType helpers + Unreal builder example test

* fix(hlsl_struct_layout): verify struct contents on cross-stage name collision

* fix(hlsl_struct_layout): treat resource-field disagreements as hard errors

* fix(hlsl_struct_layout): map Dim1D-arrayed to Undefined (unreachable, not D2Array)

* docs(hlsl_struct_layout): correct stale merge-key comment (name, not group/binding)

* docs(hlsl_struct_layout): correct magic byte sequence in wire-format spec (HSLT, not HLST)

* fix(scripting_workspace): fail HLSL bake if EITHER stage is empty (was AND, now OR)

* docs(ore_gm_rstb): correct stripper-test comment (no FXC round-trip; substring checks only)

* chore(scripting_workspace): drop unused <unordered_set> include + correct allocation comment

Author: luigi-rosso

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